Some Basic Concepts of Chemistry

JEE Main · Chemistry · 9 past questions

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1. Q1 2026 2 Apr Shift 1

   The mass of iron converted into Fe$_3$O$_4$ by the action of 18 g of steam is…

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2. Q2 2026 2 Apr Shift 2

   The ratio of mass percentage (w/w) of C : H in a hydrocarbon is 12 : 1. It has two carbon atoms. The weight…

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3. Q3 2026 4 Apr Shift 1

   Number of moles and number of molecules in 1.4187 L of SO$_2$ at STP respectively are

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4. Q4 2026 4 Apr Shift 2

   The correct order of total number of atoms present in…

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5. Q5 2026 5 Apr Shift 1

   How many grams of residue is obtained by heating 2.76 g of silver carbonate?…

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6. Q6 2026 5 Apr Shift 2

   What volume of hydrogen gas at STP would be liberated by action of 50 mL of H$_2$SO$_4$ of 50% purity…

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7. Q7 2026 6 Apr Shift 1

   An oxide of iron contains 69.9% iron, its empirical formula, is…

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8. Q8 2026 6 Apr Shift 2

   Which of the following contain the same number of atoms?…

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9. Q9 2026 8 Apr Shift 2

   Match List-I with List-II.…

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